Substrates Cross Section (1)

Through sectioning, you can observe a cross-section of the substrate.

 

Today, we will delve into the process of sectioning.

 

Process of Sectioning

 

The process of sectioning is as follows:

 

1. Punch the substrate into small rectangles or squares.

As explained later, for point sections, square punching is done, and you must be careful not to cut the point section during punching.

 

2. Insert the punched substrate vertically into a plastic mold.

For point section molds, there is a slot that allows the substrate to stand without a separate fixing device. However, for general sections, since there is no supporting structure, a folded piece of paper is used as a support. Cut a piece of thick paper that doesn't absorb liquids easily, fold it in half, and place it on both sides of the substrate.

 

3. Mix acrylic powder and acrylic solution in a 1:1 ratio to create molding compound. The consistency of the compound affects its curing time; it cures slower when the compound is more diluted and faster when it's thicker. However, excessively thick compound isn't better. To observe the substrate accurately, it's important that the compound doesn't cure with trapped air bubbles. If the compound is too thick, the bubbles might rise and get trapped before it cures fully. Also, manually removing bubbles can be challenging. Therefore, create the molding compound with a slightly diluted, suitable consistency. Another point to note is that water should not be mixed into the compound. Even a small amount of water will result in the compound not curing properly; it will become opaque and rubbery instead of solid.

After preparing the molding compound with consideration for concentration and moisture penetration, pour it into the mold. Use a needle to carefully arrange the compound in the corners, ensuring that it can seep into all areas and allowing air bubbles to escape.

 

The molded compound starts to cure as it generates heat. Be cautious when touching the mold during the curing process, as it can be hot.